Pump.



A. BULLOCK.

PUMP.

APPLICATION FILED JUNE as. 1913.

Patented Apr. 4, 1916 UNITED STATES PATENT OFFICE.

ALBERT BULLOCK, 01E LOS ANGELES, CALIFORNIA.

PUMP.

. to provide such a pump with impellers havin'g vanes or blades arranged to take water or other-liquids from an outside point and dischargeit at the center with a centripetal. action.

. It is also an object of the invention to provide a pump in which one or'more impellers may be used having blades or vanes with respect thereto.

- part of the specification:

curved transversely and set at such an angle that they will cut into liquids or materials at the outer periphery of the impeller and force the same inwardly'so as to discharge from the center of the impeller.

It is a still further'object of the invention to provide a pump in which a plurality of impellers may be employed having blades or vanes set to produce a centripetal action in the material pumped, the blades beingarranged either parallel with the longitudinal axis of the pump, or inclined or spirally With these and other objects in view the invention comprises certain novel constructions, combinations and arrangements of .parts to be hereinafter described and claimed. a I e In the accompanying drawing forming a Figure 1 is a longitudinal view partly in section of a pump constructed in accordance with this invention. Fig. 2 is a transverse sectional view taken through the impellers o f'the.

pump and the intake opening, in: a Plane at right angles to the plane of the section in Fig. 1. view showing a portion 'of one of the blades or vanes of the'pump impeller, the icross sectional shape. thereof being indicated in section. Fig. 4 is a fragmentary sectional, view through a pump casing showing a single impeller mounted therein.- Fig..5 is a detail View showing a pump in side elevation, mounted in apit or. well. Fig. 6 is a detail sectional-view taken centrally Specification of Letters Patent.

Fig. 3 is a detail perspective Patented Apr. 4, 1916.

Application filed June 16, 1913. Serial No. 7" ?3,808.

. the center and through a central discharge openlng, securing a centripetal or whirlpool action. I v

In the drawing the preferred construction of the pump has been illustrated and the details and features of the invention will be specifically described.

In the drawing 10 indicates a casing, preferably inclosed at one end and provided with removable head or cover 11 at its other end. Mounted within the casing 10 is an impeller 12 having a hollow shaft 13 at one end which passes outwardly through an opening in the head 11, a packing gland 14 being provided to aflord a tight joint between the parts. The impeller 12 is formed with'head portions at each end which are eonnectedby means of longitudinally ex tending vanes or blades 15. One end of the said impeller is closed by a'plate 16 which is formed with a'journal 17 adapted to extend into a journal bearing 18 formed in the casing 10.- Ball bearings 19' interposed between the parts at the end of the journal 17 afford antifriction means for receiving the end thrust of the piston or impeller 12. The vanes or blades 15 may be arranged to extend'parallel with the axis ofthe impeller, suitable openings being arranged between them for permitting of an easy passage of 'at 21 to slip easily from the said material at the inner edge-of the blade.

.Casing 10 is formed with an inlet opening 22 upon one side of the pump and the materials entering the pump pass therethrough and into a tapering diminishing space 23 within the casing, the walls of said casing being of spiral formation in cross section as clearly shown in Fig. 2. The impeller 12 is so set in the said casing that it approaches closely the wall of the casing 10 at 23, to one side of the inlet 22. The impeller is rotated in the direction of the arrow 24 so that the blades move with the incoming stream and gradually cut into the same so as to force its substance toward the center. The shaft 13 may be provided with any rotating means as for instance a gear 25. It will be evident that a pulley or other force receiving means might be used to turn such shaft and the impeller 12. I

The pump is preferably provided with a plurality of impellers and the vane carrying portion of the outer impeller 12 is made of sufficient size to afford ample space within to receive inner impellers. -Thus as shown in Figs. 1 and 2 an inner impeller 26 may be mounted within the outer impeller, said inner impeller having one head provided with a journal 27 engaging a bearing formed within the journal 17, and a ball or other bearing 28 may be interposed between the end of the journal 27 and the adjacent portion of the casing 10 to receive the end thrust of the inner impeller. The other end of the impeller is provided with a hollow shaft extension 29 having a hearing within the shaft 13. A packing gland 30 between the parts prevents the escape of liquids or materials from the pump. The said shaft 29 is also provided with a gear wheel 31 by which it may be rotated for driving the impeller. The inner impeller 26 is provided with vanes 32 preferably of similar shape in cross section through the vanes 15 of the outer impeller. The said vanes 32 are usually and preferably inclined or arranged in somewhat spiral relation to the axis of the impeller as indicated in Figs. 1 and 2 of the drawing. The impeller 26 is driven in the same direction as the impeller 12 though generally a little more rapidly thus preventing any back pressure of the materials pumped, the direction being indicated by arrow 33 in Fig. 2. The inner space or opening between the vanes 32 is usually as large or of slightly larger diameter than the outlet opening or passage through the shaft 29. The materials delivered from the pump through said shaft 29 may be discharged in any desired manner or may. be forced into piping 34 having a packing gland 35 to surround and receive the rotating end of the said pipe 29.

A single lmpeller as shown in Fig. 4 may' be employed instead of a plurality thereof without departing from the spirit of the invention. Thus as shown in Fig. 4 the pump may have an impeller 36 made similar to the impeller. 12 and when one impeller only is employed, the blades 37 thereof are preferably slightly inclined or spirally arranged,

though of course they can be kept in lines parallel with the axis of the impeller as in the case of the impeller 12 if preferred.

In operation, the inlet opening of the casing lOis connected, usually by piping with the source of materials to be pumped. The impellers are then set in motion and where there are more than one impeller, the inner one is driven a little faster than the other ones. The liquids or 1 other materials are thus drawn into the casing, the vanes of the impellers cutting into the stream and forcin'g said materials inwardly where they are again caught by the vanes of the inner impeller and forced outwardly from the center of the pump through the hollow shaft 29. The device may be connected in pipe lines of any kind for impelling or driving liquids therethrough or it may be set in vertical position as shown in Fig. 5 for lifting liquids or materials from a pit or well indicated Other modifications of the invention may be adapted also to various uses within the scope of the invention. Thus as shown in Figs. 6 and? the impeller 40, may be pro vided with vanes 41 radiating from the central hub 42, the outer ends of the vanes.

42 has a projecting bearing end portion adapted to be seated and held against end thrust by a spider 45 mounted in said housing 43. The arms 46 of the spider maybe inclined and shaped as shown in Fig. 6 to give direction to the liquids pumped and tend to whirl or rotate the same so that the vanes of the impeller will readily cut into and force the same through the outlet shaft 44. Such an impelling pump is well adapted for interposition in pipe lines for impelling liquids such as oil and the like, as well as for lifting liquids. It will be understood that when the impellers of the forms described are driven at proper speed, the liquids or materials pumped will be given a twisting movement and will be forced along with somewhat a whirlpool action at the outlet.

What is claimed is:

1. A pump having a peripheral inlet and a central outlet and impellers having vanes with fiat body portions and forwardlyv impeller having vanes set in twisted relation 3. A pump having outer andinner impellers, the outer impeller having vanes parallel with the axis thereof and the inner to the axis of said impeller and means for rotating the said impellers.

at. A pump comprising a casing having a peripheral inlet, an impeller mounted therein and having a hollow shaft projecting through the wall thereof whereby it may be turned, said impeller having vanes extending longitudinally of the impeller and having curved outer edges adapted to cut into the materials tobe pumped, and an inner impeller having a hollow shaft projecting through the shaft of the outer impeller for delivering the materials pumped, said inner impeller having vanes arranged upon a spiral twist and formed with outer cutting edges adapted to force the materials pumped through the said hollow shafting, and means I connected with each of the hollow shafts for turning them and driving the. impellers.

5. A pump having a casing formed with antifriction bearings at one end and a discharge outlet at the other end, said casing also having an inlet opening in its side wall, impellers mounted within the said casing and having concentric journals engaging said antifriction bearings, said impellers also havmg concentric hollow shafts adapted to conduct the materials pumped through the outlet opening of the. casing.

6. A pump comprising a casing having a lateral intake and an axial outlet, an impeller mounted in said casing having heads and connecting vanes arranged with spaces between them, said vanes having their inner edges curved forwardly in the direction of the movement of the impeller, and their outer edges tapered and curved in the other direction, the structure being such that upon rotating the impeller materials will be drawn inwardly and forced through the said axial outlet, and means for rotating the said impeller.

In testimony whereof, I have hereunto set my hand, in presence of two witnesses.

ALBERT BULLOCK. Witnesses:

LILLIE VoLLMER, CAssELL' SEVERANCE. 

